Portable desk lamp



,column is,.grasped asa hand grip.

' cient tirnefor 'the column V'to coolfto` Ya, point Aer I I .STATE-sPATENT-- i y k,Laurence E. Corcoran,'1B,1'1l."falo,y N. Y'. f I,npplicanoncctober 13, 1949,seria1-3No.4121,211 a 3 Claims. (cl.240g-'sri y v v. 1

invention relates to V*improvements in portable .deskor table ,lampsofthe type which includesl a `pedestal comprising ,a base and anuprightfcolumn :for-med and -.proportioned :to ser-ve as a hand V-gripwhen the lamp is to lbe moved from-one .position to another,..a lowercup-like reflector vdirected upwardly,` ,enclosing 4the f vlamp bulb-andIhavingfits:flower portion adjoining lthe column-and formeclfasgacaptokerrclose the-lamp sceketeand a cover which provides, lor. carries,.an A

upper reflector directed (downwardly, the cover being-supported :fromtheV lower .'renector,

In lamps .of'rthisgfype chef-base column and" cupy wfithftheupperfreflector vv,are formed as separable"elements and @their assembly is.maim

tainedby za tubular threaded Ystem -vvhich pro* n jects through the,pedestal andfis rconnected .to the damp. socket, :the stemserving as `a`conduit for the-fwi-resland'maintaining the assembly of thepartspcooperating with the I.cup 4and the base Y g` as rclampin'gf-elementsfinr relation to the column lamps arel :adwantagecus 'zbecause4they giveza concentrated-pool of --lig-ht'uponthe workv ing planeAfat-anangle such-faste minimize glare and -Aalso conceal-fthe source:of ,lightfirom the workerfat the desk` erta-lele` 7thense of such lamps*,it is `-irecmently. desirable that they be movedfrom one-position toanother .on the -desk orltablefand itfisffor thefpurpose `of conveniencein effecting isuch :movement :that the column .is formed landpnoportioned fto nserve :as a hand the :reflector becomes:-

heated ,layv :the rad-iaL tion V;f-ronf1-fthe lamp =bulb-and fits heatis tua-nsresult that after a few minuteseof use the columnbeoomes1=sorhot thaxtffit-isinotipractical to grasp it in order to movethe lamp, wherefore the lamp is quite apt tjo'be dropped when the heatedTherefore, in order conveniently to move the lamp it is 4Intheaccoinpanying drawing:

Figure lis Lan elevation of ,alamp in accordance with the invention.

.Eignre'Z is a vertical vsectional viewy of the base, column, y.cup andlower reflector features of the lamp, the electric 'bulb ,being shown.in eleva-y tion. v

f l LFigure `3 is anjexpibrldlperspective View of e1fe mentsV employedin the ,heat inslation ,oi v the colnmn`from'the cup.v The1known.elements.of theglamniin relationjto the ,fveatuwlfesjwhichconstitutes theinvention, ,in-

clude fthefbase l, the tubolari column '2,f ythe lower upwardly' facingconical reector 13 Vand thetubular cup 4 preferably' inteera1 with therellector and projecting 'axially from "its lower end, the

cupfll 'beingpreferably of.4 the same. vdiameter'.as the'columnandbeing'provided with 'a'base 5 hav` ing a central opening to,accommodate #the threaded tubular stem whichj'seryes as va conf duitfor they .wires and by jwhichftheassembly Vol. `theenumerated partsismaintainedgjfhe reflecting surface, in .accordance with knownpractice, may be. provided directlyon the reflector 3'jor`it may,asfQshowniand preferredbe provided by a separateicupshaped element lwhichiis'ltte'd Agrip.'2.,flnvfever,as heretorfore constructed, .such

vlamps,@havehad la fseriousidisadvantage in that l necessary toswitchoil the lig'ht and allow suf@ at whiclrritvcan be convenientlyf'grasped.f d 1 Une-object of the `inventicfnfisto provide simple and' practicalmeans of noveleharacterincluded usual ornamentaljiniial l2;

inthe assembly of the .pedestal @base and'fcolumn) i to another deskoritable;

within the reflector and has a'bottorn opening through which the Aneckof the `'lamp 3bulb may be inserted, 'the lamp Dulbprojecting from the`usual, socket c -fencibsedwithm the up 4. "The cup `4 'has'.at one sidean opening .toaccornmoda'te thestemf 'ofthe nsnalfflamp'switch 9.1 K

'Ihe .lairlp,r lfiursi1-arit 'tof `known mechanical lde# sign,isfcoinpleted by a downwardly facing-cover 10 supported 'from thefre'lecto-r,v 3. The cover- 12B includes a downwardly l'facinglreflector 4feature and has Aits lower edge below the upper ledgefof thereflector f3, jthereby to conceal the source of light ffrorn the workerand to protect the worker from the 'glanej of the' direct 'rays ofA"lighti Wlhile the cover lt) may be-nished to serve as a reflector "itis preferable ltl'iat the irei-lector `feature "be provid-ed by,vangappropriately formed' reliectorv plate Il whclri:*is sufficientlyshownby dotted lines -hiriilliguieIl. fThe cover carries `the The'LC-Crerflnzaccordance with ,kmr/11' Pre?? tice, is snppo`rtedjr'onjlfthe'refle'ctor 3 by suitab'ly formedlupward'ly projecting arms I3, the

lower portions of which may b'e 'bolted or lotlnier'- y Wiseseure'dto'henlpper 'portion f the rededor 3 and'th'elippe'r portions of whichdirectly supiport lthe y cover. In the construction shown wherein thecover l! is connected to a separate reflector plate .ll the upperportions of the armsV column 2 is closed at its upper end by a washer vA y I6 of inverted cup shape, that is to say, a washer which is providedwith an upwardly directed cylindrical flange I'I overlying and slightlyspaced from the lower end of the cup 4. The column 2 is also closed atits lower end and the end closures provide a dead air space I8 withinthe column. While the lower end of the column 2 could be closed .bybearing directly upon the upper face of the base I, itis-,preferablethat it bear upon a washer llllwhichr in turn bears upon the upper faceof the base I.V :The'washer I9 may be flat or it may, as shown, be,cup-shaped, that is to say formed similarly tothe washer I6 but with itscylindrical flange 20 extending downwardly and bearing upon the upperface offthe base 2. The washers IG'and ISI areformed with centralopenings andthe stem 6 extends Aloosely through these openings.. AThewasher I6 is preferably formed withu [aT-downwardly projecting boss ,22and the washer- .I 9VV is preferably formed with a similar,butt-upwardly projecting, boss 23. The diameters ofthe-bosses 22 and 23conform to the internal `diameter ,of the column 2 whereby these bosseshave ra -close t. within ythe -adjacent ends of the column and serve twofunctions, one ofI which is positively to maintain the centeredalinementfof the lcolumn ,with respect to -the base I and'thefcup4., andthe othenof which lis substantially to` sealffthef dead. air spacell..

The washerII isheat insulated from thecup 4 by piled washers `24 of-suitable'.heat insulating material, e. .g..,`comlpressed asbestos felt,the upper face of the upper washer 24 bearing against the underface ofthe base v5 of the, cup YIl and the lower face of the lower washervv2li. bearing against the upper Iface of the .washer v,l6, .A Thecuppedform ofthe washer IIlprovides; a closed chamber 25 in which.v thewashers 2.4' are arranged.v It will, of course,- .be obvious .-that asingle heat'insulatingvwasherof fsuitable thickness -may 4be usedinstead of, Aand yinthe same relation and for `the same purpose asftheseparate piledwashers 24u 7 .g Y

The slight spacing of --the flange lI1 of the washer `I6 from the. lowerend of the `cup 4 substantially yprevents the transmission of=1heat byconduction fromthe cup 4 to the flange I1. 'The washers24 prevent thetransmission of heat by conduction fromthe Acup!! to the washer IGandthe -column l2. l Any heat: thatvmayf be. transmittedbyconductionfromthe Icup .-4 to the stem 6 is substantially occludedfrom the column 2 by the dead airspace I8 and from the washers I6 and I9by virtue of their loose t about the stem 6. By virtue of these severalheat insulating features the'column 2 atall times remains comfortablycool,- that is to say, substantially at room temperature whereby it maybe QmfOrtably grasped when the lamp is to be moved from one position toanother. The washer I6 has the further advantage of visually demarkingthe column 2 from the cup 4 whereby the user of the lamp will naturallygrasp the column 2 as a hand grip and will not grasp the cup 4.

I claim:

1. A portable desk lamp of the type which includes a pedestal comprisinga base. and an upright tubular column formedv and` proportioned to serveas a hand grip when the lamp is to be moved from one position toanother, a lower cup-like reflector directed upwardly, enclosing thelamp bulb with its lower portion adjoining the column and formed as acup to enclose the lamp socket, the cup having a base, the column "beingpositioned between the bases of the cup and the pedestal, the bases ofthe cup and the pedestal being provided with alining central openings,and a stem externallythreaded and extending through the column' and thecentral openings in the bases of the cup and offtl'e pedestal vandcooperatingfwith the :bases of vthe cup and pedestal asclamping"elements'-iii'relation to the column: wherein thefoppo'siteends of the column, adjoining the baseso f the cup andv the pedestalrespectively are" closed to pro vide a dead air' space, thefclos'ure-'atithe'upper end of the column consisting 'of a 'cup-sha edwasher which'abutsthe upper endr of-the'column, has a central openingvthrough"which4 the stem extends looselyfan'd a1's fha$anpwardlyprojecting cylindrical'` ange which "surrounds and is spaced from thelower end o'f the' cu'p, and additional washer" means of heatinsulating"ma terial is interposed between' tlfif'eY cup-shaped washerand the base of the cup'ffy 'f 2. A portable -deslclarr'rpas 'set'forth' in` claiml wherein the closures forf'th' opposite ends 'of thecolumn which form f the dea'd air space are formed with bosseswhichproject'into tha-adjacent ends of the' column -r'a'nd snugly'flt into'the cylindrical wall thereof, thereby to' maintain the centralalineme'nt yof the'Y column with fre'- spect to the bases ofthepedestal'and-the cup and substantiallyItoseal'tltie dead air space2""= j3. A portableV desk lamp'asset forth' in claim'l wherein the closure atthe lov'v'er'y end of 'the 'column consists of a washer bearingagainstthe upper face of the base'of'the pedestal and each of theclosurewashers lis' provided ywithfaboss which projects l into theadjacent end ofithe column and'snuglyl lits into a lcylindrical 'wallthereof, 'thereby to maintain -the central" aline-v ment of the columnwithrespect to' the base of the pedestal and the cup and substantiallyseal the dead airspace.v l A Vl'nAUltENQE E. CORCORAN.

REFERENCES CITED The following references arepfrecord inthe file of thispatent: i n v UNITED STATES PA'I'ENTS ,.2

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